Compare 50/21 and 42/64, Which fraction is greater?

Compare 50/21 and 42/64

1^st number: 2 8/21, 2^nd number: 42/64

50/21 is greater than 42/64

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 64 is 1344

Next, find the equivalent fraction of both fractional numbers with denominator 1344
For the 1st fraction, since 21 × 64 = 1344,
50/21 = 50 × 64/21 × 64 = 3200/1344
Likewise, for the 2nd fraction, since 64 × 21 = 1344,
42/64 = 42 × 21/64 × 21 = 882/1344
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
3200/1344 > 882/1344 or 50/21 > 42/64

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad